This Mr. Heater® 80,000 BTU liquid propane convection heater packs a big punch in a small package. The MH80CVX utilizes the natural act of warm air rising to quickly heat up to 2,000 square feet. It's equipped with a thermoelectric safety valve to shut the gas flow off if the flame ever goes out. To use, just hook-up the supplied ten foot propane hose and regulator assembly to a minimum 20-pound propane tank, then easily light the heater utilizing the factory-installed piezo igniter, and enjoy the comforts of a toasty warm jobsite.